/**
 * JFunny - A funny programming language
 * Copyright (C) 2013  fanguangping
 * Any problem email me: fguangping@gmail.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 **/
package org.jfunny.core.util;

import org.apache.commons.lang.StringUtils;

/**
 * 字符串处理工具类
 * 
 * @author fanguangping
 * 
 * 
 */
public class StringUtil extends StringUtils {
	public static final String UTF8_BOM = "\uFEFF";

	/**
	 * 移除注释
	 * @param source
	 * @param commentPrefix
	 * @return
	 */
	public static String removeComments(String source, String commentPrefix) {
		StringBuffer buffer = new StringBuffer();

		String[] lines = source.split("\n");
		for (String line : lines) {
			if (!isBlank(line) && !line.startsWith(commentPrefix)) {
				buffer.append(line);
				buffer.append("\n");
			}
		}
		return buffer.toString();
	}

	/**
	 * 移除UTF8的BOM信息
	 * @param s
	 * @return
	 */
	public static String removeUTF8BOM(String s) {
		if (!isBlank(s) && s.startsWith(UTF8_BOM)) {
			s = s.substring(1);
		}
		return s;
	}
}
